[pbs-devel] [PATCH docs 1/3] docs: explain the working principle of the change detection modes

Thomas Lamprecht t.lamprecht at proxmox.com
Mon Nov 25 22:09:25 CET 2024


Am 18.11.24 um 10:24 schrieb Christian Ebner:
> Describe in more details how the different change detection modes
> operate and give insights into the inner workings, especially for the
> more complex `metadata` mode, which involves lookahead caching and
> padding calculation for reused payload chunks.
> 
> Suggested-by: Dietmar Maurer <dietmar at proxmox.com>
> Signed-off-by: Christian Ebner <c.ebner at proxmox.com>

it would be additionally good to describe why mtime, not ctime and when
metadata detection can fail (if user/tools do bad things).

And for the overview it would be great to note why a data mode exists, as
there can be some confusions from users interpreting this as three different
ways to create the archive(s), not two ways to do that with two change detection
modes.
Could be also interesting to note that it works with older PBS in general beside
some archive specific features like file-browsing.

This mail is inspired a bit from the post I replied here:

https://forum.proxmox.com/threads/proxmox-ve-8-3-released.157793/page-2#post-723212




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